Surname
Some inconsistency in the spelling of the surname has led to confusion as to the correct spelling. The credits of any episode where her parents appeared list their last name as "Green" and on the Warner Bros. Friends Official Website the biography on Jennifer Aniston states her character's name as Rachel Green. However, in certain episodes it is seen to be spelled "Greene" such as when her name was written on an invitation sent out by Ross and a subsequent RSVP. Finally, Jennifer Aniston confirmed that the name Green was spelled: G-R-E-E-N.
Read more about this topic: Rachel Green